Dental tool holder



June 17. 1924. 1,498,283

W. A. KELSEY DENTAL TOQL HOLDER Filed May 31, 1922 X A A [/v VEN TOR MLL/HM v A KELGEY Patented June 17, 1924.

PATENT? cr me,

WILLIAM A. KELSEY, or nrnnnaroms, nrnnnsotra.

DENTAL Application filed May 31,

Be it known that 1, WILLIAM A. Kn'LsnY, a'citizen of the- United States, residentof Minneapolis, county of Hennepin, State of Minnesota, have invented certain new and useful Improvements in Dental Tool Hold ers, of which-thefollowing is a specification;

The object of my invention is to provide a holder wherein dental tools may be'sup ported and held during the operation of grinding their cutting edges. Tools of this kind are comparatively small and delicate and have narrow cutting edges for working around the teeth and itis very essential that these edges be ground 'un'iformlyor the tool will not fit the'tooth surface that is'being operated on.

Furthermore, it is essential thatthe cutting edgesare not ground too-much or too little or'the tool will be rendered useless forthe purpose for which it isdesigned;

My invention consist s, therefore, in providing 'a' holder adapted to receive tool shanks of different shapes and for holding the cutting edges in the desired position for grinding.

Further the invention consists in various constructions and combinations, all as hereinafter described and particularly pointed out in the claims. a

In the accompanying drawings forming part of this specification,

Figure 1 is a rear elevation of a dental tool holder embodying my invention,

Figure 2 is a front view of the same,

Figure 3 is a longitudinal sectional view on the line 33 of Figure 5,

Figure 4: is a horizontal sectional view on the line 44 of Figure 5,

Figure 5 is a sectional view on'the line 55 of Figure 1,

Figure 6 is a sectional view'on the line 66 of Figure 1,

Figure 7 is a sectional view on the line 7 7 of Figure 1.

In the drawing, 2 represents a suitable base, having a flat under surface with comparatively wide end portions and an intermediate connecting portion 3 that is consid erably narrower than the end portions. A

block 4, substantially in the form of a yoke,

has its end portions seated on the part 3 and secured thereto by suitable means, such as screws 5. A recess 6 is formed in the block 4 to receive a movable jaw 7 that is adapted tov slide vertically therein and pins TOOIJ HOLDER.

1922; seriarne: sea-ass;

8 fit within a soeket '9in' said' jaw and projec't into slots 10' in the ends' of theblo'ck" 4 and form'ameans for guidingtheawlon gitudinally and" preventing it from binding 5 in the recess-6 when pressure is appliedthere to. The block 1, as show'nin the drawings;

isarranged ntan angle of approximately ten degrees from' the vertical with respect to'the b ase toprovidethe requisite 'angularity' and the necessary clearance for the cutting blade of the tool during the grinding oper-' ation. Y

"A screw 11' has a finger grip '12thereon A and a ball 13 1111; its lower end which fitsinto' a socket in-thejaw 7 andgforrns a ball and socket connection therewith ffor raisingand lowering the jaw while allowing it tooscillate' slightly and seat itself 'on the shanks of the tools Beneath the movable'jaw-I provide stationaryseats 14-, l5and 16 andupon these s'eats 'the shanks of differently shaped'dental tools are placed; For instance," as shown in Figure 5, the seat 14 is adapted to receive a slightly curved shank on the tool, while the seat 15, as shown in Figure 6, is adapted for a straight shank and the seat 16, as shown in Figure 7, receives a tool that is curved oppositely to the shank of Figure 5 and additional seats may be provided, if desired, to adapt the holder to any form or shape of dental tool which the operator may wish to place therein.

The movable jaw and the seats or stationary jaws are preferably formed, as shown in the sectional views, with bearing surfaces at the front and rear, while the middle portion is recessed or cut away, the forward portion of the stationary jaw being substantially the same for all the tools to receive the extremity of the shank and support the cutting edges of the tools in the same relative position with respect to the bottom of the holder and the grinding surface of the stone on which the tool is placed.

The rear side of the holder shows the stationary jaw seats upon different levels to accommodate tool shanks of different shape, while the face or front of the holder shows thejaw seats upon the same level to support the cutting edges of the tools in the same relative position and insure uniform contact of said edges with the grinding surface.

I claim as my invention:

1. A dental tool holder comprising a base having a fixed jaw therein to receive the shank of a dental tool, with the cutting edge i of the tool depending below the under surface of said base, the surface of said fixed jaw below which said tool depends being flush substantially with a surface of said base, and a movable jaw mounted in said holder for engaging and clamping the tool shank therein.

2. A dental tool holder comprising a base provided with stationary jaw seats formed to fit straight and curved shanks, with the edges of the tools depending below the under surface of said base for contact with the grinding surface. and a movable jaw for clamping all the tool shanks on said stationary jaw seats.

3. A dental tool holder comprising a base having stationary jaw seats therein to receive tool shanks of diflerent shape, with the edges of the tools depending below the under surface of said base, a yoke mounted on said base at an incline and a movable jaw therein for engaging the shanks of the tools, a screw mounted in said yoke and having a ball and socket bearing in said movable jaw and means for guiding said jaw in said yoke.

4. A dental tool holder comprising a base having stationary jaw seats therein to re ceive tool shanks of different shape, with the edges of the tools depending below the under surface of said base, a yoke mounted on said base and a movable jaw therein for engaging the shanks of the tools, a screw .mounted in said yoke and having a ball and socket bearing in said movable jaw and means for guiding said jaw in said yoke, said means comprising pins fitting within a socket in said jaw and slidable in recesses provided in said yoke.

5. A dental tool holder comprising a base, a yoke member mounted thereon at an incline to the vertical, said base having a fixed jaw upon which the shank of the tool to be sharpened is seated, the surface of said fixed jaw beyond which the edge of the tool to be sharpened projects being flush substantially with a surface of said base, a movable jaw mounted in said yoke member for engaging and clamping the shank of the tool against said fixed jaw, and an operating screw for said movable jaw mounted in said WILLIAM A. KELSEY. 

